---
title: MTRCarbonMonoxideConcentrationMeasurementMeasurementUnit.PM3
framework: matter
role: symbol
role_heading: Case
path: matter/mtrcarbonmonoxideconcentrationmeasurementmeasurementunit/pm3
---

# MTRCarbonMonoxideConcentrationMeasurementMeasurementUnit.PM3

## Declaration

```swift
case PM3
```